There must be something in the water, because there’s been a noticeable baby boom in Hollywood.

From Carrie Underwood and Mike Fisher’s firstborn child, to Alicia Keys and Swizz Beatz’s second son, to Ryan Reynolds and Blake Lively‘s daughter, we can’t help but notice all the new babies arriving into Tinseltown in recent weeks.

“Our boys Cy and Bowie are finally here. Marco and I wanted to thank you for your beautiful wishes and for your patience,” the "Guardians of the Galaxy" actress Tweeted. “Happy ―! Starting our New Year with a full house.”

The twins arrived on Nov. 27, 2014, but Saldana announced their birth in early 2015.

“I have been dreaming of this moment for as long as I can remember, the day I was going to meet my little girl. A friend recently told me how magical today was going to be because it’s the day I would meet my best friend,” Vanessa wrote.

“The name Sasha is of Greek and Russian descent and means ‘defender of mankind’ and ‘warrior,’” the birth announcement reads. “The hospital confirmed that both mother and child are in excellent health.”

Sailor Gene Gardner

It was another boy for Liv Tyler.

"The Leftovers" actress, 37, and her boyfriend, sports manager/agent David Gardner, welcomed their baby boy on Feb. 11. “He’s healthy and everyone is very happy,” her rep said at the time, remaining mum on the moniker.

Then on Feb. 20, the newborn’s nautical name was revealed with a photo of Liv’s sweet tot holding a blue stone necklace featuring a diamond encrusted anchor.

The "Armageddon" star captioned the image: “Sailor Gene Gardner.”

Sailor is the actress’ second son — she welcomed Milo in Dec. 2004 with ex-husband Royston Langdon.

Gardner is also dad to 7-year-old son Gray from his previous marriage.

Lachlyn Hope Gosselaar

Congratulations to Mark-Paul Gosselaar and Catriona McGinn.

The "Saved by the Bell" alum, 40, and his wife welcomed their second child - daughter Lachlyn Hope – on Feb. 17, he announced via Twitter.

The newborn is Gosselaar’s second child with McGinn. They are also parents to 16-month-old son Dekker Edward.

This is the fourth child for Gossellar. The actor is also dad to son Michael Charles, 10, and daughter Ava Lorenn, 8, from his previous marriage.

Isaiah Michael Fisher

Big congratulations to Carrie Underwood and Mike Fisher.

The country music superstar, 31, and her hockey player husband, 34, welcomed their first child – son Isaiah Michael Fisher – on Feb. 27, she announced via Instagram.

“Tiny hands and tiny feet…God has blessed us with an amazing gift! Isaiah Michael Fisher – born on February 27. Welcome to the world, sweet angel!,” the proud new mom captioned the first photo of their newborn’s hand.